Niagara Escarpment.

The escarpment is the cliff face of a ridge that is as the edge of a much larger formation called the Michigan Basin. The Michigan basin is a roughly circular depression in the earth's crust, centered under the state of Michigan. It is formed of layers of sedimentary rock (Silurian and Ordovician rock) that were created over 420 million years. The majority contents of the cap rock is dolomitic limestone, which could be easily eroded into shales as it can be observed on the photo.

Hamilton, ON